Bump nokogiri from 1.8.2 to 1.13.6

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.8.2 to 1.13.6.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.8.2...v1.13.6)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -7,14 +7,19 @@ GEM
       rake (~> 10)
       semver2 (~> 3.4)
     map (6.6.0)
-    mini_portile2 (2.3.0)
-    nokogiri (1.8.2-x64-mingw32)
-      mini_portile2 (~> 2.3.0)
+    mini_portile2 (2.8.0)
+    nokogiri (1.13.6)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    nokogiri (1.13.6-x64-mingw32)
+      racc (~> 1.4)
     os (1.0.0)
+    racc (1.6.0)
     rake (10.5.0)
     semver2 (3.4.2)
 
 PLATFORMS
+  ruby
   x64-mingw32
 
 DEPENDENCIES